Eollee mill



(NoModel.) 2 Sheets-Sheet l.

N. W. HOLT.

ROLLER MILL.

No. 298,208. Patented M8578, 1884.

w zyeieZ-oi" 2 Sheets-Sheet 2.

.N.'W. BOLT.

VROLLER MILL.

No. 298,206'. Patentearlvray, 1884.

UNITED STATES PATENT ,()iuucnA NOAH w. BOLT, OE EUEEALO, NEW YORK.

ROLIER-MILL.

SPECIFICATION forming part ofYLetter-s Patent No. 298,206, dated May 6,1884.V

Application filed January 21, 1884. (No model.)

To all whom it may concern.-

Be-it known that I, N OAn W. HoL'r, of the city of Buffalo, in thecounty of Erie and State of New York, have invented new and usefulImprovements in Roller-Mills, of which the following is a specification.

This invention relates to an improvement in that class of roller-millsin which two pairs of rollers are employed; and it has for its ob- IO'ject to provide a belt driving mechanism which can be tightened whenrequired, and in which a counter-shaft is employedwhich is support ed infixed bearings.

My invention consists of the improvement in the construction of thedriving mechanism which will be hereinafter fully set forth, and pointedout in the claims. y

In the accompanying drawings, consisting of two sheets, Figure 1represents an elevation of the driven side of a roller-mill providedwith my improvement. Fig. 2 is an end elevation of the roller-mill. Fig.3 is a side elevation of the tightening device on the driving side ofthe roller-mill. Fig. 4 is a horizontal section in line a: x, Fig. 3.Fig. 5 is an elevation of the driving side on a reduced scale.

Like letters of reference refer to like parts in the several figures.

A represents the side frames of the rollermill.

B B represent the fast rollers, and B B the slow rollers. (Indicated bybroken lines in Fig. 1.)

@5N c represents the horizontal driving shaft arranged below theroller-mill, and C a beltpulley secured to the same.

D D are belt-pulleys secured to the shafts of the fast rollers B B abovethe driving-pulley C.

d is an endless driving-belt running around the pulleys C and D D', andcommunicating motion to the latter.

E represents an adjustable tightener-pulley the pulleys D D. This pulleyis mounted on arranged on one side of the roller-mill belowsecured tothe floor or to the side frames, A,

or to some other stationary part.

I represents an internally-toothed gearwheel, secured to the shaft h onthe driving shaft e is journaled, is pivoted on the end of 6o the shafth, so `that in adjusting the frame G it swings on the shaft h as anaxis, thereby causing the pinion i to remain in engagement with thewheel I in all positions of the frame G. 'Ihe latter is provided at itsupper end 65 with a gear-segment, j, arranged concentrically with theshaft h. The gear-segmentj is j made in the form of a dovetail, andmoves in a bearing-piece, J, having a curved dovetail groove, j,wherebythe upper end of the frame G is held against lateral movement, whilecapable of being adjusted in the are of a circle. 7c represents aworm-wheel engaging with the segment j, and mounted on a shaft, k',which is journaled in bearings Z, secured to the bear- 7'5 ing-piece J.The end of the shaft k is provided with a hand-wheel, Z', whereby it canbe turned for adjusting the position of the frame G and for raising andlowering the pulley E. The driving-belt d runs around the lower side ofthe pulley C, thence upwardly and around the upper side of the pulley D,thence down- 4wardly and around the lower side of the pulley E, thenceupwardly and around the upper side of the pulley D', and thencedownwardly to the pulley C. The belt d is tightened by lowering thepulley E.

M M represent the belt-pulleys secured to the shafts of the slow rollersB B on the driven side of themachine. NN are pulleys secured to the endof the counter-shaft h below the pulleys M M, and m and a are endlessbelts running around the pulleys N N and the pulleys M M.

O represents an adjustable tightener-pulley arranged between the belts mand n, so as to operate againstboth belts simultaneously. Thetightener-pulley O is mounted on a stud o r arbor, o', which is attachedto a sliding piece, P, fitted between vertical guides or ways p p. Thelatter are attached to the side frame, A, and the piece P is madeadjustable by a setscrew, q. 'Ihe power is transmitted from the pulley Cto the pulleys D D and to the coun- IOO ter-shaft h by the belt d. Fromthe countershaft the motion is transmitted to the pulleys M M', so as toretard the slow rollers l B, as desired. The belt d is tightened byadjusting the pulley E, and the belts m and a are both tightenedsimultaneousl y by adjusting the pulley O.

A friction-gear may be employed instead of the cog-wheels I i, ifdesired.

I claim as my inventionl. The combination, with two pairs of rollers, BB and I I3', of pulleys I) D and M M', secured to the rollershafts onopposite sides of the machine, a counter-shaft, Il, carrying a wheel, I,and pulleys N N, an adjustable pul` ley, E, mechanism whereby motion istransmitted from the pulley E to the wheel I, and endless driving-beltsd, m, and 91 substantially as set forth.

2. The combination, with the fast rollers I3 I3 and the slow rollers lY, of the counter shaft 71, supported in iixed bearings, atightener-pullcy, E, a belt, d, driving said tightenern pulley and thefast rollers,mechanism whereby power is transmitted from saidtightener-pul ley to said counter-shaft, and a belt -driving mechanismprovided with a tightening device, and connecting the counter-shaft withthe slow rollers, substantially as set forth.

3. rlhc combination, with the rollers 13B and B B, of the pulleys D Dand BI M', counteisshaft l1, tightcncr-pullcy E, made adjust ableconcentric with said counter-shaft, meehanisnl whereby motion istransmitted from the tightencr-pulley E to said counter-shaft, and

mechanism whereby the counter-shaft is e011- neeted with the pulleys MM, substantially as set forth.

4C. In a roller-mill, the combination, with the counter-shaft lz,provided with a wheel, I, of the pulley E, shaft e, and pinion t', aframe, G, pivoted concentric with the shaft 71 and means whereby theframe Gr can be secured in position, substantially as set forth.

In a rollermill, the combination, with the pulleys M M', shaft h,pulleys N N, and belts ma, o1' a tightenerpulley, O, operating againstboth belts, substantially as set forth.

(5. In a roller-mill, the combination, with the counter-shaft 71provided with a wheel, E, of a frame, G, pivoted concentric with. saidshaft, and provided with a shaft, e, and pinion t', a gear-segment,j,formed on said said frame, and a wornrwhcel, k, substantially as setforth.

7. In a roller-mill, the combination, with the frame A and counter-shalt71, of a frame, G, pivoted concentric with the counter-shaft, andprovided with a dovetail segment, j, a bearingpiece, J, secured to theframe A, and having a curved dovetail groove, j', a shaft, c, supportedin thc frame G', and means whereby the frame G is adjusted and securedin position, substantially as set forth.

\Vituess my hand this 12th dayfof January, 158i..

